megrealign, head models

[Teresa Montez]

Dear Robert,

Thanks for your help.

> For MEG data, it is preferable to spatially realign them prior to
averaging, since the helmet location is different for each subject.

Using:

cd (['E:\Data\AD_Project\Patients\' subj{i}])
load data
cfg=[];
cfg.channel = {'all','-MLT21','-MLT22' , '-MLC42', '-MLO43', '-MZO02' ,
'-MLT41' , '-MZP01' , '-MRT35'};
cfg.repair  = 'yes'
cfg.realign = 'yes'
cfg.hdmfile='E:\Backup_Compaq\Matlab\DIPOLE\singleSphere.hdm';
cfg.planar  = 'yes'
data_planar_nobad=meginterpolate(cfg,data);

I get the error message:

 ??? Error using ==> svd
NaN or Inf prevents convergence.

Error in ==> megrealign>prunedinv at 361
[u, s, v] = svd(lf);

Error in ==> megrealign at 260
bkalign = lfold * prunedinv(lfnew, cfg.pruneratio) * realign;

Error in ==> meginterpolate at 116
data = megrealign(cfg, data);

Error in ==> script_home_database_rob at 66
data_planar_nobad=meginterpolate(cfg,data);


- Should I use a local spheres head model?

Best regards,
Teresa